Economizer for transverse-drum boilers



H. J. KERR.

ECONOMIZER FOR TRANSVERSE DRUM BOILERS.

- APPLICATION FILED MAY 4. I918. 1,345,369. Patented y 6,1920.

2 SHEEIS-SHEET l I/III/IIIII/ INVENTOR.

X, :64 BY 4 ATTORNEYS.

H. J. KERR.

ECONOMIZER FOR TRANSVERSE DRUM BOILERS.

APPLICATION FILED MAY 4, I918.

Patented July 6, 1920.

2 SHEETSSHEEI 2.

7" an a. Q @U a 9' Q 3 i0 ,5 i g aa'zaaaw g Q60 o oo goooooq oo@ OOO L 19 0 {Ta 0 INVENTOR.

BY fl 'vATTOR/VEYS.

I j UNITED TA-res PATENT OFFICE.

HOWARD J. KERR, or BAYONNE, NE JERSEY, AssIGNoR TO THE 135130001: 4: wILcox COMPANY, or BAYONNE, NEW JERSEY, A CORPORATION or NEW transverse steam and water drums connected JERSEY.

To all whom it may concern:

Be it known that I, HOWARD J. K ERR, a citizen of the United States, reslding at Bayonne, in the county of Hudson and State of New Jersey, have invented anew. and

useful Improvement in Economizers for Transverse-Drum Boilers, of'which the following is a full, clear, and exact description. 1 Y

My invention relates to boilers of the gen eral Stirling type, wherein upper transver'se Water drums are connected by banks of tubes to a lower transverse mud drum or drums, I

the gases being given serial up and down passes over the heating surface by suitable baflling. The object of the invention is to provide a simple and compact economizer system in connection with such bollers to improve the efliciency of the economlzer system, and to provide for short circuiting of the gases over the economizer, if deslred.

In the drawings Fi ure 1 is a sectional side elevation of a tirling boiler with economizer constructed in accordance with my invention; Fig. 2 is an enlarged detail v1ew of the short-circuiting damper; and

Figs. 3, 4 and 5 are front e evations partly broken away showing different arrangements of the superimposed economizer boxes located in the rear of the front surface of the rear wall of the setting. p I e In the drawings 2, 3 and 4 represent by banksof tubes 5, 6 and 7, respectively, with/a lower transverse mud drum 8.

I have shown the drums 3' and 4 as connected by water circulators 9, andthe steam space of the front and rear drums is connected to the middle drum by steam circulators 10. The steam may be taken off either the middle or rear upper drum. I. have also shown the boiler as fired by underfeed stokers 11, located under the front wall 12 of the setting. r l

At the rear of the rear bank of water tubes, I show a feed water heater or economizer comprising rows of water tubes 13, connected at their upper ends to the water space of the rear steam and water drum 2,

while their lower ends are bent rearwardly and enter transverse boxes 14, shown as Specification of Letters Batent.

ncoNorvrrznR roR TRANSVERSE-DRUM BOILERS;

Patented July 6,1920.

Application filed May 4, 1918. Serial 170. 232,478.

located in a pocket in the rear wall formed by suitable transverse metallicmembers 15. By locating these cross boxes in the rear of the chamber of the setting, a more compact setting is obtained, and the lower parts of the eeonomizer tubes are more eflective' where the gases flow downwardly over these as compristubes. I have shown the bathing e mud drum ing a bafile 16, extending from t upwardly along the rear of the front bank,

and baffle 17 extending downwardly from the upper drum 3 between the last two rows of tubes, and a baflle 18 extending upwardly from a damper 19', coacting with the mud damper 19 is mounted on a transverse shaft extendlng through the setting and which 'may be set at d'ifl'erent angles by an ex.

ternal stop or handle 20 (Fig. 2), held by suitable pins or stop members 21. The damper may thus be held in closed position, as shown in full lines in Fig. 2, or in open position, as shown in dotted'lines therein.

The gases, therefore, flow upwardly through the front bank, pass over the in verted U-tube superheater 22, and down over the majority of the tubes of the middle bank,

drum, to a point short of the drum 2. The

thence rise over the last tubeslof the middle bank and the tubes of the rear bank, and then descend over the tubes of the feed Water heater or economizer to the outlet 23.

damper may or may not be used as desired,

and if not used, the baflle 18 may be ex tended down to the mud drum 8.

In all forms, thefeed water preferably enters the lowermost of the boxes 14. In

Fig. 3, the feed water entersthrough valve" connection 24 into a vertical box 25 at the end of the boxes 14, and thence through nipples into the end of each box, flowing in parallel therethrough. The boxes are center of the lowermost box through section 24, rises through nipples 28 into the next cross box, thence through nipples 29 into the third cross box, and thence through nipples 30 into the top cross box, these nipples to be staggered, as illustrated. In all forms,the cross boxes are provided with'suitable handholes or closures for access to the tube ends.

The advantages of my invention will be obvious to those skilled in the art, since a very compact setting is made possible. The counterfiow principle givesefliciency in the economizer tubes, and the damper, if used,

provides for short circuiting of the gases.

In my arrangement, there isa substan tially continuous upward flow of water through the economizer tubes, thus preventing the hot water in the upper drums. flowing downward through the economizer tubes.

The temperature conditions are substantially balanced between the economizer tubes, the temperature being lowest at the lowermost point of the economizer and gradually increasing along the tubes from the bottom to the top, thus leading to a maximum efficiency through the action of the counterflow principle. There is a balancing of circulation between the econ omizer tubes, these tubes at any level beingoi substantially the same temperature. 7

Changes maybe made in the form and arrangement of the boiler, the number of. drums, the arrangement of the banks of tubes, etc., without departing from my invention. 7 What I claim and desire to secure by Letters Patent of the United States is- V 1. A boiler of the general Stirling type having transverse upper drums connected by banks of tubes to a lower transverse drum or drums, baffling arranged to give the gases serial up and down passes over the tubes, a rear economizer havlng tubes w1th1n the setting'and their upper ends connected to one of the upper transverse drums, and their lower ends bent rearwardly, and a plurality upper ends of which are connected to the water space of the rear steam and water drum, and a plurality V of superimposed water boxes at the rear of the setting, the

lower ends of the economizer tubes being bent rearwardly and connected tosaid boxes.

3. A boiler of the general Stirling type having transverse upper drums connected by banks of tubes to a lower transverse drum or drums, a set ofeconomizer tubes the upper ends of which are connected to the water space of the rear steam'and water drum, a plurality of superimposed water boxes at the rear of the setting, the lower ends of the economizer tubes being bent rearwardly and connected to said boxes, a water inlet con nection for said boxes whereby the water is drums, a bathe in the rear of the rear bank 7 v of tubes, economizer tubes back of said bafile, the upper ends of said economizer tubes being connected to the rear steam and water drum and the lower ends of said tubes being bent rearwardly, a plurality of water'boxes at the rear of the setting to which the lower ends of the economizer tubes are connected,

7 and a feed water inlet for the boxes arranged to cause'an upward flow through the economizer tubes.

5. A boiler of the general Stirling type having transverse upper drums connected by banks of tubes to a lower transverse drum or drums, a bafile in the rear of the rear bank of tubes, economizer tubes back of said baffle, the upper ends of said tubes being connected to the rear steam and water drum and the lower ends of said tubes bent rearwardly, water boxes at the rear of the setting to which the lower ends of the economizer tubes are connected, a feed water inlet for the boxes arranged to cause an up-flow through the economizer tubes, and an ad j ustable damper at the lower end of the, rear bank baflle.

6. A boiler of the general Stirling type I having transverse upper drums connected by banks of tubes to a lower transverse drum or drums, a rear set of feed water tubesthe upper ends of which are connected to one of the upper transverse drums, a plurality of superimposed boxes at the rear of the setting to which the lower ends of the economizer tubes are connected, a feed water inlet for the lower ofsaid boxes, and connections be-f tween the boxes.

7. A boiler of the general Stirling type having upper and lower drums connected by banks of tubes, an economizer having tubes adjacent the rear of said banks and within the boiler setting, said economizer tubes having their upper ends connected to one of the upper drums and their lower ends bent rearwardly, baflling arranged to give the gases serial up and down passes over the banks of tubes and the economizer tubes, the rear vertical Wall of the setting being located relatively closely adjacent the rearmost baifie to constitute a pass adapted to direct the gases along the Vertical portions of said economizer tubes and across their bent ends,

10 and a header located in said vertical wall and connected to the lower ends of said economizer tubes.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

HOWARD J. KERR.

Witnesses:

A. N. LoWEs, J. G. BRODERMANN. 

